Pop star Britney Spears appears on the cover of Harper’s Bazaar’s June 2011 issue, looking gorgeous in a white Bill Blass dress. Inside the issue, Britney discusses the lessons pop icon Madonna taught her: “I guess she’s really taught me to stay true to myself. That seems like a simple thing to say, but she taught me through action, not just by saying it. There are so many people around you that have opinions, but you just have to listen to your instincts.”

Britney also revealed her favorite fashion moment from her almost-20-year career: “I went to the Grammys in 2002, and I had really curly, curly hair. I had a red dress on. It wasn’t short and saucy; it was a long red dress. That dress was fun.”

And her biggest fashion mistake: “Ten years ago at the Billboard awards, I wore this orange hat and orange bra and orange booty pants and purple fishnets. Oh, and I had an orange jacket on,” says Britney. “I actually thought I looked hot at the time. But, um, I definitely stood out.”

For more, head to HarpersBazaar.com or pick up the issue when it arrives on newsstands on May 31.